OpenCV VideoCapture failed in capture RTSP video stream

Autonomous Machines Jetson & Embedded Systems Jetson TX1
1

Hi all,

I met a problem while using OpenCV’s VideoCapture function to read the RTSP video stream from a web cam. Here is the result from gdb:

Thread 1 “python” received signal SIGSEGV, Segmentation fault.
0x0000007fb17a3c38 in av_buffer_unref ()
from /usr/lib/aarch64-linux-gnu/libavutil-ffmpeg.so.54

And my OpenCV version is 3.3 with CUDA support, Python version is 2.7.

Thanks a lot for any advices.

Tianpei

2

Could you share your sample code?

3

Sure，here is my code:

import cv2

source = “rtsp://admin:pwd@ipaddress”
cap = cv2.VideoCapture(source)
ret, frame = cap.read()

while True:
cv2.imshow(“Frame”, frame)
key = cv2.waitkey(1) & 0xFF

if key == ord("q"):
    break

The video source is a webcam video stream, and I tried these lines in terminal, I got segmentation fault after typing the cv2.VideoCapture line. And I used gbd to run these lines again to get the error info in my first post. Thanks a lot for your help.

4

Sure，here is my code:

import cv2

source = “rtsp://admin:pwd@ipaddress”
cap = cv2.VideoCapture(source)
ret, frame = cap.read()

while True:
cv2.imshow(“Frame”, frame)
key = cv2.waitkey(1) & 0xFF

if key == ord(“q”):
break

The video source is a webcam video stream, and I tried these lines in terminal, I got segmentation fault after typing the cv2.VideoCapture line. And I used gbd to run these lines again to get the error info in my first post. Thanks a lot for your help.

5

My code can work, but I don’t have account/pwd setting.

import cv2

source = "rtsp://10.19.106.192:8554/test"
cap = cv2.VideoCapture(source)


if cap.isOpened():
        cv2.namedWindow("demo", cv2.WINDOW_AUTOSIZE)
        while True:
                ret_val, img = cap.read();
                cv2.imshow('demo',img)
                cv2.waitKey(10)
else:
        print "camera open failed"

cv2.destroyAllWindows()
6

Thank you for your reply. I tried your code in my terminal, but it failed again at the cv2.VideoCapture line, it showed segmentation fault as I mentioned in my first post. I tested to use local video as source video for OpenCV and it worked. Have no idea if I need to re-install the ffmpeg module and OpenCV. BTW which version of OpenCV are you using?

7

Hi 516920502,

My opencv is installed through Jetapck3.2 which should be v3.3.1. Please select mmapi sample in jetapck and it will install opencv. That is my environment setup.

8

OK, I will try this way to setup OpenCV again. Thanks.